A power supply system providing a power conversion function for a system circuit includes first, second and third convertor circuits respectively including plural switches and first, second and third inductors. The first and second convertor circuits are coupled to first and second power supplies respectively through first and second ports of the system circuit. A third power supply is coupled to a battery module and an internal load circuit. The plural switches are configured to correspondingly switch the first to third inductors to perform power conversion between the first to third power supplies and an internal power bus of the system circuit. The voltage of the internal power bus is configured to be higher than any voltage of the first to third power supplies, such that a current of the internal power bus is lower than a third current of the third power supply.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The power supply system of claim 1, wherein the first preset length is at least 10 times greater than the second preset length.
3. The power supply system of claim 1, wherein in the high dropout mode, a ratio of the internal bus voltage to the third voltage is relevant to a ratio of the first preset length to the second preset length.
6. The power supply system of claim 5, wherein the second converter circuit and the first converter circuit are positioned on the first side of the system circuit, wherein the first sub-bus power generated by the first converter circuit and a second sub-bus power generated by the second converter circuit are first electrically connected to each other on the secondary board, and next electrically connected to the internal bus connection end of the third converter circuit through the flexible circuit board or the internal connection wire to generate the internal bus power.
7. The power supply system of claim 4, wherein the system circuit is a notebook computer, and the first port and the second port conform to universal serial bus (USB) type-C port, and wherein at least one of the first power, the second power and the third power is provided by a power supply device which is an electronic device compliant with the USB PD specification.
12. The power supply system of claim 4, wherein the internal bus power comprises the first sub-bus power generated by the first converter circuit and a second sub-bus power generated by the second converter circuit, wherein the power supply system further comprises a control circuit for controlling a ratio between a first sub-bus current of the first sub-bus power and a second sub-bus current of the second sub-bus power to be a preset current ratio according to a first current sensing signal and a second current sensing signal, wherein the first current sensing signal is relevant to a first inductor current of the first inductor, and the second current sensing signal is relevant to a second inductor current of the second inductor.
13. The power supply system of claim 12, wherein the preset current ratio is relevant to a first rated power of the first power and a second rated power of the second power, wherein the first port and the second port are ports conforming to USB type-C specification, wherein the first power and the second power are respectively provided by a first power supply and a second power supply, wherein the first rated power and the second rated power are obtained by communicating with the first power supply and the second power supply through a configuration channel of the first port and a configuration channel of the second port, respectively.
15. The power supply system of claim 14, wherein the shunt circuit comprises a diode, one of the current amplified signal corresponding to the first converter circuit and the current amplified signal corresponding to the second converter circuit, which has the highest voltage, is selected as the balance adjustment signal.
16. The power supply system of claim 12, wherein the preset current ratio is one.
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May 22, 2023
December 17, 2024
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